fix the new source fill patch

Source/driver/Castro_advance_sdc.cpp

@@ -251,11 +251,8 @@ Castro::do_advance_sdc (Real time,
     // store the new solution
     MultiFab::Copy(S_new, *(k_new[SDC_NODES-1]), 0, 0, S_new.nComp(), 0);
 
-
-    // I think this bit only needs to be done for the last iteration...
-
     // We need to make source_old and source_new be the source terms at
-    // the old and new time.  we never actually evaluate the sources
+    // the old and new time.  we never actually evaluated the sources
     // using the new time state (since we just constructed it).  Note:
     // we always use do_old_sources here, since we want the actual
     // source and not a correction.
@@ -273,7 +270,7 @@ Castro::do_advance_sdc (Real time,
     clean_state(S_new, cur_time, 0);
     expand_state(Sborder, cur_time, Sborder.nGrow());
     do_old_sources(new_source, Sborder, cur_time, dt, amr_iteration, amr_ncycle);
-    AmrLevel::FillPatch(*this, old_source, old_source.nGrow(), cur_time, Source_Type, 0, NUM_STATE);
+    AmrLevel::FillPatch(*this, new_source, new_source.nGrow(), cur_time, Source_Type, 0, NUM_STATE);
   }
 
   finalize_do_advance(time, dt, amr_iteration, amr_ncycle);